By using Zur, Eternal Schemer to animate Enduring Vitality into an enchantment creature, you unlock a clever loop where Enduring Vitality's granted mana ability lets it tap to produce the exact white mana needed to animate it again. Once it is a creature, you can sacrifice it to Phyrexian Altar to generate the generic mana required to fund Zur's ability while adding to your storm or death count. Tuktuk Rubblefort sits quietly on your board ensuring the loop runs smoothly, while Enduring Vitality's own death trigger reliably brings it right back to the battlefield as an enchantment, ready to be animated and sacrificed all over again.